The BUILD team has announced the deprecation of most zSeries distros in Evergreen. Among the C driver tasks are included several which use the rhel72-zseries-test distro. Its deprecation is coming shortly. The announcement indicates that going forward there will be a zSeries distro based on RHEL8 which will be the only available zSeries distro in Evergreen.

Once the RHEL8 distro is announced as available, the C driver Evergreen configuration needs to be updated to migrate the affected tasks to use the supported RHEL8 zSeries Evergreen distro. This last point is important to ensure that we do not completely lose build and test coverage on big endian architectures.